EP3647560A1 - Foreign matter removing device, and turbocharger provided with foreign matter removing device - Google Patents
Foreign matter removing device, and turbocharger provided with foreign matter removing device Download PDFInfo
- Publication number
- EP3647560A1 EP3647560A1 EP17923462.0A EP17923462A EP3647560A1 EP 3647560 A1 EP3647560 A1 EP 3647560A1 EP 17923462 A EP17923462 A EP 17923462A EP 3647560 A1 EP3647560 A1 EP 3647560A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil
- channel
- contamination removing
- removing device
- supply channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000011109 contamination Methods 0.000 claims abstract description 240
- 238000005096 rolling process Methods 0.000 claims abstract description 64
- 230000001050 lubricating effect Effects 0.000 claims abstract description 40
- 238000003780 insertion Methods 0.000 claims description 20
- 230000037431 insertion Effects 0.000 claims description 20
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 230000007423 decrease Effects 0.000 description 6
- 239000000470 constituent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/06—Arrangements of bearings; Lubricating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/14—Lubrication of pumps; Safety measures therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/04—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/06—Filters making use of electricity or magnetism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
- F01M2001/1028—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the type of purification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
- F01M2001/1028—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the type of purification
- F01M2001/1042—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the type of purification comprising magnetic parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
- F01M2011/031—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means characterised by mounting means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/40—Application in turbochargers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/50—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/98—Lubrication
Definitions
- the present disclosure relates to a contamination removing device and a turbocharger including the contamination removing device.
- Patent Document 1 discloses a turbocharger with a rotary shaft supported by a rolling bearing.
- the rolling bearing is configured to be lubricated with oil lubricating each part of an engine during operation of the engine and to be washed away with clean oil stored in another place.
- Patent Document 1 2012-57544A
- the lifetime of a rolling bearing is significantly influenced by the quality and the quantity of contaminations included in oil.
- it is required to lubricate the rolling bearing with oil which includes less contaminations than oil lubricating each part of an engine.
- the problem arises in that the lifetime of the rolling bearing may be shortened if the rolling bearing is lubricated with the oil lubricating each part of the engine as in Patent Document 1.
- the filter is clogged in a short term because of its small mesh size.
- an object of at least one embodiment of the present invention is to provide a contamination removing device and a turbocharger including the contamination removing device.
- the contamination removing device can remove contaminations from oil to such an extent suitable for lubricating the rolling bearing supporting a rotary shaft of the turbocharger and can easily be replaced when its contamination removal performance decreases.
- a contamination removing element having specifications different from specifications of a contamination removing element for removing contaminations from oil for lubricating each part of an internal combustion engine provided with a turbocharger, it is possible to remove the contaminations from the oil to such an extent suitable for lubricating a rolling bearing.
- a body portion including the contamination removing element is detachable from the housing of the turbocharger, it is possible to easily replace the contamination removing element when contamination removal performance thereof decreases.
- a turbocharger 1 includes a turbine rotor 2, a compressor rotor 3, a rotary shaft 4 connected to the turbine rotor 2 and the compressor rotor 3 respectively and rotating with the turbine rotor 2 and the compressor rotor 3, and a rolling bearing 5 supporting the rotary shaft 4, and a housing 6 accommodating the rolling bearing 5.
- the housing 6 internally forms an oil supply channel 7 for supplying oil to the rolling bearing 5 and an oil discharge channel 8 for discharging oil from the turbocharger 1.
- the oil supply channel 7 and a pipe 9 for oil supplied from an engine (internal combustion engine) (not shown) provided with the turbocharger 1 communicate with each other via a contamination removing device 10 detachably attached to the housing 6.
- the rolling bearing 5 is arranged so as to support the rotary shaft 4 between the turbine rotor 2 and the compressor rotor 3.
- the rolling bearing 5 includes a cylindrical inner race 50 coaxially coupled to the rotary shaft 4, a cylindrical outer race 51 arranged coaxially with the inner race 50 and radially outward of the inner race 50, and a plurality of rolling elements 52 disposed between the inner race 50 and the outer race 51.
- the inner race 50 and the outer race 51 are arranged at intervals from one another over an entire circumferential direction.
- the oil supply channel 7 is branched into two branched oil supply channels 7a, 7b at a downstream end thereof.
- the branched oil supply channels 7a, 7b respectively communicate with a space between the inner race 50 and the outer race 51 via through holes 51a, 51b formed in the outer race 51.
- the oil supplied from the engine (not shown) via the pipe 9 sequentially flows through the contamination removing device 10, the oil supply channel 7, and the branched oil supply channels 7a, 7b to be supplied to the space between the inner race 50 and the outer race 51.
- the oil discharge channel 8 has one end which communicates with open ends 5a, 5b on both sides of the rolling bearing 5 in the axial direction and the space between the inner race 50 and the outer race 51, and the other end which communicates with a discharge hole 53 opening to the oil discharge channel 8.
- the oil supplied to the space between the inner race 50 and the outer race 51 is discharged to the oil discharge channel 8 via the open ends 5a, 5b and the discharge hole 53, flows through the oil discharge channel 8, and then is discharged from the turbocharger 1.
- the contamination removing device 10 includes a body portion 11.
- the body portion 11 includes an insertion attachment portion 12 and a head portion 13 shaped into a hexagonal column by six flat side surfaces 14.
- the body portion 11 is an attachment for attaching the contamination removing device 10 to the housing 6 of the turbocharger 1 by an operation to be described later.
- a first female screw 7d is formed from an opening 7c of the oil supply channel 7 in the housing 6 toward the rolling bearing 5.
- the inner diameter of the oil supply channel 7 and the outer diameter of the insertion attachment portion 12 have the same diameter.
- the root diameter of the first female screw 7d and the outer diameter of the first male screw 15 have the same diameter.
- an oil channel 20 penetrating in the axial direction of the body portion 11 is formed.
- the oil channel 20 is configured such that one open end 20a thereof opens to an upper end surface 13a of the head portion 13, and the other open end 20b thereof opens to an end 12a of the insertion attachment portion 12.
- a connection portion 21 serving as a female screw is formed from the open end 20a toward the open end 20b.
- the connection portion 21 is configured to be screwable with a male screw formed at the tip of the pipe 9 (see FIG. 1 ).
- a contamination removing element 23 includes a filter 23a of a cup shape and a cylindrical holding member 24 holding the filter 23a.
- a second male screw 25 configured to be screwable with the second female screw 22 is formed. Screwing the second male screw 25 to the second female screw 22, the holding member 24 holding the filter 23a is provided in the oil channel 20. That is, it is possible to easily provide the contamination removing element 23 in the oil channel 20 by screwing the second male screw 25 to the second female screw 22.
- the holding member 24 is not limited to the above-described configuration.
- the holding member 24 holding the filter 23a may be configured to be pushed into the oil channel 20 by an interference fit.
- the filter 23a may be replaced by replacing the contamination removing device 10 itself or by pushing the holding member 24 holding the filter 23a from the opposite end of the oil channel 20 to be removed.
- the filter 23a having specifications different from specifications of the filter for oil for lubricating each part of the engine.
- the filter 23a having a mesh size which causes clogging in a short term if used for the oil for lubricating each part of the engine, such as 3 to 15 ⁇ m, preferably 10 ⁇ m.
- the oil for lubricating each part of the engine (not shown) is partially supplied to the contamination removing device 10 via the pipe 9.
- the oil supplied to the contamination removing device 10 has its contaminations removed by the filter 23a (see FIG. 4 ) when flowing through the oil channel 20 (see FIG. 4 ).
- the mesh size of the filter 23a is smaller than that of the filter for the oil lubricating each part of the engine, the oil flowing through the contamination removing device 10 has less contaminations than the oil lubricating each part of the engine.
- the oil having less contaminations sequentially flows through the oil supply channel 7, the branched oil supply channels 7a, 7b, and the through holes 51a, 51b and is supplied to the rolling bearing 5, that is, the space between the inner race 50 and the outer race 51 to lubricate the rolling bearing 5.
- the oil supplied to the space between the inner race 50 and the outer race 51 flows out to the oil discharge channel 8 from the rolling bearing 5 via the open ends 5a, 5b or the discharge hole 53, flows through the oil discharge channel 8, and then is discharged from the turbocharger 1.
- the filter 23a having the specifications different from specifications of a filter for removing the contaminations from the oil for lubricating each part of the engine provided with the turbocharger 1, it is possible to remove the contaminations from the oil to such an extent suitable for lubricating the rolling bearing 5.
- the body portion 11 including the filter 23a is detachable from the housing of the turbocharger, it is possible to easily replace the filter 23a when contamination removal performance thereof decreases.
- Embodiment 1 it is possible to configure such that an inner diameter r of the pipe 9 is smaller than an outer diameter R a of the holding member 24 of the contamination removing element 23.
- an inner diameter r of the pipe 9 is smaller than an outer diameter R a of the holding member 24 of the contamination removing element 23.
- the root diameter of the connection portion 21 serving as the female screw portion and the outer diameter of the first male screw 15 can have the same diameter in the contamination removing device 10.
- the pipe 9 is directly connected to the oil supply channel 7 if the turbocharger 1 does not include the contamination removing device 10.
- the outer diameter of the male screw portion (not shown) formed at the tip of the pipe 9 and the root diameter of the first female screw 7d (see FIG. 3 ) of the oil supply channel 7 have the same diameter.
- Embodiment 2 a contamination removing device according to Embodiment 2 will be described.
- the contamination removing device according to Embodiment 2 is obtained by modifying Embodiment 1 in terms of the contamination removing element.
- Embodiment 2 the same constituent elements as those in Embodiment 1 are associated with the same reference numerals and not described again in detail.
- the contamination removing element 23 is a cylindrical magnet 23b.
- the second male screw 25 screwing to the second female screw 22 is formed on the outer circumferential surface of the magnet 23b. That is, the cylindrical magnet 23b is provided in the oil channel 20 coaxially with the oil channel 20.
- Other configurations are the same as Embodiment 1.
- the oil supplied to the contamination removing device 10 by the same operation as Embodiment 1 flows through the oil channel 20.
- the oil flows inside the cylindrical magnet 23b when flowing through the oil channel 20.
- Contaminations included in oil are often substances attracted to a magnet, such as metallic powder.
- the oil having its contaminations thus removed is supplied to the rolling bearing 5 (see FIG. 1 ) by the same operation as Embodiment 1, lubricating the rolling bearing 5.
- Embodiment 2 since it is possible to attach, to the contamination removing device 10, the magnet 23b which serves as the contamination removing element 23 having specifications different from the specifications of the filter for removing the contaminations from the oil for lubricating each part of the engine provided with the turbocharger 1, it is possible to remove the contaminations from the oil to such an extent suitable for lubricating the rolling bearing 5. Moreover, since the body portion 11 including the magnet 23b is detachable from the housing of the turbocharger, it is possible to easily replace the magnet 23b when contamination removal performance thereof decreases.
- the magnet 23b is not clogged unlike the filter 23a and has a lower oil supply resistance than the filter 23a, making it possible to suppress a possibility of a trouble in supplying oil to the rolling bearing 5 as compared with a case in which the filter 23a is used.
- the contamination removal performance of the filter 23a can be adjusted by selecting the mesh size.
- the contamination removal performance of the magnet 23b can be adjusted by adjusting the axial length of the magnet 23b and/or the strength of a magnetic force of the magnet 23b.
- Embodiment 2 it is possible to configure such that the inner diameter r of the pipe 9 is smaller than an outer diameter R b of the magnet 23b.
- Embodiment 3 a contamination removing device according to Embodiment 3 will be described.
- the contamination removing device according to Embodiment 3 is obtained by modifying Embodiment 1 in terms of the body portion of the contamination removing device.
- Embodiment 3 the same constituent elements as those in Embodiment 1 are associated with the same reference numerals and not described again in detail.
- a contamination removing device 30 is attached to the housing 6 such that the axial direction of the body portion 31 and the axial direction of the oil supply channel 7 intersect between the rolling bearing 5 and the opening 7c of the oil supply channel 7.
- the contamination removing device 30 has a cuboid body portion 31.
- an oil channel 40 is formed, which penetrates in a direction orthogonal to the axial direction of the body portion 31.
- the second female screw 22 is formed from one open end 40a toward the other open end 40b of the oil channel 40.
- the contamination removing element 23 includes a filter 23c of a disc shape and the cylindrical holding member 24 holding the filter 23c.
- the second male screw 25 configured to be screwable with the second female screw 22 is formed. Screwing the second male screw 25 to the second female screw 22, the holding member 24 holding the filter 23c is provided in the oil channel 40. That is, it is possible to easily provide the contamination removing element 23 in the oil channel 40 by screwing the second male screw 25 to the second female screw 22.
- an attachment hole portion 35 is formed into which the body portion 31 of the contamination removing device 30 (see FIG. 9 ) can be inserted.
- the attachment hole portion 35 divides the oil supply channel 7 into a first oil supply channel portion 7e having the opening 7c and a second oil supply channel portion 7f to which the branched oil supply channels 7a, 7b are connected. Inserting the body portion 31 of the contamination removing device 30 into the attachment hole portion 35, the oil channel 40 (see FIG. 9 ) can make the first oil supply channel portion 7e and the second oil supply channel portion 7f communicate with each other, and the oil flowing through the pipe 9 (see FIG. 8 ) sequentially flows through the first oil supply channel portion 7e, the oil channel 40, the second oil supply channel portion 7f, and the branched oil supply channels 7a, 7b to be supplied to the rolling bearing 5.
- Other configurations are the same as Embodiment 1.
- Embodiment 3 forming, in the housing 6 in advance, the attachment hole portion 35 into which the body portion 31 of the contamination removing device 30 is to be inserted, it is possible to attach the contamination removing device 30 to the housing 6 just by inserting the body portion 31 of the contamination removing device 30 into the attachment hole portion 35. Thus, it is possible to easily attach the contamination removing device 30.
- Embodiment 3 it is possible to configure such that an inner diameter r' of the first oil supply channel portion 7e is smaller than an outer diameter R c of the holding member 24 of the contamination removing element 23.
- the end surface 6a of the housing 6 serves as a retaining portion for preventing the contamination removing element 23 from falling off the oil channel 40.
- a recessed portion 45 may be formed, which includes the open end 40a of the oil channel 40 and is recessed from the surface of the body portion 31 concentrically with the oil channel 40.
- the disc-shaped filter 23c may be arranged in the recessed portion 45 to make the surface of the filter 23c and the surface of the body portion 31 flush with each other. In this case, it is configured such that the inner diameter r' of the first oil supply channel portion 7e is smaller than an outer diameter R d of the filter 23c.
- the filter 23c is retained by the end surface 6a of the housing 6 defining the opening 7c' of the first oil supply channel portion 7e.
- the end surface 6a of the housing 6 serves as a retaining portion for preventing the filter 23c from falling off the oil channel 40.
- Embodiment 4 a contamination removing device according to Embodiment 4 will be described.
- the contamination removing device according to Embodiment 4 is obtained by modifying Embodiment 3 in terms of the contamination removing element.
- the same constituent elements as those in Embodiment 3 are associated with the same reference numerals and not described again in detail.
- the contamination removing element 23 is a cylindrical magnet 23b.
- the second male screw 25 screwing to the second female screw 22 is formed on the outer circumferential surface of the magnet 23b. That is, the cylindrical magnet 23b is provided in the oil channel 40 coaxially with the oil channel 40.
- Other configurations are the same as Embodiment 3.
- Oil is supplied to the contamination removing device 30 by the same operation as Embodiment 3.
- a principle that contaminations are removed from oil by the magnet 23b provided in the contamination removing device 30 is the same as Embodiment 2.
- the oil having its contaminations removed by the magnet 23b is supplied to the rolling bearing 5 (see FIG. 8 ) by the same operation as Embodiment 3, lubricating the rolling bearing 5. Therefore, it is possible to obtain the same effect as Embodiment 2.
- Embodiment 4 it is possible to configure such that the inner diameter r' of the first oil supply channel portion 7e is smaller than the outer diameter R b of the magnet 23b.
- the end surface 6a of the housing 6 serves as a retaining portion for preventing the magnet 23b from falling off the oil channel 40.
- the recessed portion 45 may be formed, which includes the open end 40a of the oil channel 40 and is recessed from the surface of the body portion 31 concentrically with the oil channel 40.
- the cylindrical magnet 23b may be arranged in the recessed portion 45 to make the surface of the magnet 23b and the surface of the body portion 31 flush with each other. In this case, it is configured such that the inner diameter r' of the first oil supply channel portion 7e is smaller than the outer diameter R b of the magnet 23b.
- the magnet 23b is retained by the end surface 6a of the housing 6 defining the opening 7c' of the first oil supply channel portion 7e.
- the end surface 6a of the housing 6 serves as the retaining portion for preventing the magnet 23b from falling off the oil channel 40.
- Embodiment 5 a contamination removing device according to Embodiment 5 will be described.
- the contamination removing device according to Embodiment 2 and the contamination removing device according to Embodiment 3 are attached to the turbocharger.
- the same constituent elements as those in Embodiments 2 and 3 are associated with the same reference numerals and not described again in detail.
- the contamination removing device 10 according to Embodiment 2 is attached to the housing 6 of the turbocharger 1 by the configuration described in Embodiment 2.
- the contamination removing device 30 according to Embodiment 3 are attached to the housing 6 of the turbocharger 1 with the configuration described in Embodiment 3.
- Other configurations are the same as Embodiments 2 and 3.
- the oil for lubricating each part of the engine (not shown) is partially supplied to the contamination removing device 10 via the pipe 9.
- the oil supplied to the contamination removing device 10 has its contaminations attracted to the magnet 23b (see FIG. 6 ) to be removed when flowing through the oil channel 20 of the contamination removing device 10 (see FIG. 6 ). Subsequently, the oil flows into the contamination removing device 30.
- the oil has its contaminations removed by the filter 23c (see FIG. 9 ) when flowing through the oil channel 40 of the contamination removing device 30 (see FIG. 9 ).
- the filter 23c removes the contaminations after the contaminations are removed by the magnet 23b in the above configuration, the quantity of the contaminations removed by the filter 23c is reduced as compared with a configuration in which the filter 23c first removes the contaminations from the oil flowing through the pipe 9. Thus, it is possible to increase a time before the filter 23c is clogged, that is, the lifetime of the filter 23c.
- An operation of lubricating the rolling bearing 5 with the oil from which the contaminations are removed in two stages by the contamination removing devices 10 and 30 is the same as Embodiments 2 and 3.
- the contaminations can be removed from the oil in the two stages by the contamination removing devices 10 and 30, it is possible to lubricate the rolling bearing 5 with cleaner oil.
- Embodiment 5 it is possible to apply some modified examples described in Embodiment 2 to the contamination removing device 10 and to apply some modified examples described in Embodiment 3 to the contamination removing device 30.
- the contamination removing element 23 of the contamination removing device 10 is the magnet 23b
- the contamination removing element of the contamination removing device 30 includes the filter 23c.
- the present invention is not limited to this configuration. It may be configured such that the contamination removing element 23 of the contamination removing device 10 includes the filter 23a, and the contamination removing element of the contamination removing device 30 is the magnet 23b, it may be configured such that the respective contamination removing elements 23 of the contamination removing devices 10 and 30 include the filters 23a and 23c, or it may be configured such that the contamination removing element 23 of each of the contamination removing devices 10 and 30 is the magnet 23b.
- the head portion 13 of the contamination removing device 10 has the hexagonal column shape.
- the head portion 13 is not limited to this shape. It is only necessary that there are at least two flat side surfaces 14 so that the head portion 13 can be nipped by a tool. Since a polygonal column shape has not less than three side surfaces, the head portion 13 may have an arbitrary polygonal column shape. In these cases, at least two flat side surfaces and side surfaces forming the arbitrary polygonal column each serve as a tool fixing portion. Furthermore, the tool fixing portion is not limited to the flat side surface of the head portion 13.
- the tool is a wrench of a type with a handle in a tubular socket
- a groove having the same shape as the cross-sectional shape of the socket is formed in the upper end surface 13a of the head portion 13, and the tool is turned while inserting the socket in the groove, making it possible to turn the body portion 11.
- the groove serves as a tool fixing portion.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Supercharger (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
- The present disclosure relates to a contamination removing device and a turbocharger including the contamination removing device.
- In order to support a rotary shaft of a turbocharger, a sliding bearing such as a floating bush is adopted. In recent years, however, a rolling bearing is adopted for a loss reduction.
Patent Document 1 discloses a turbocharger with a rotary shaft supported by a rolling bearing. In the turbocharger ofPatent Document 1, the rolling bearing is configured to be lubricated with oil lubricating each part of an engine during operation of the engine and to be washed away with clean oil stored in another place. - Patent Document 1:
2012-57544A - The lifetime of a rolling bearing is significantly influenced by the quality and the quantity of contaminations included in oil. In general, it is required to lubricate the rolling bearing with oil which includes less contaminations than oil lubricating each part of an engine. Thus, the problem arises in that the lifetime of the rolling bearing may be shortened if the rolling bearing is lubricated with the oil lubricating each part of the engine as in
Patent Document 1. In contrast, using a filter suitable for the oil lubricating the rolling bearing to remove contaminations from the oil lubricating each part of the engine, the problem arises in that the filter is clogged in a short term because of its small mesh size. - In view of the above, an object of at least one embodiment of the present invention is to provide a contamination removing device and a turbocharger including the contamination removing device. The contamination removing device can remove contaminations from oil to such an extent suitable for lubricating the rolling bearing supporting a rotary shaft of the turbocharger and can easily be replaced when its contamination removal performance decreases.
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- (1) A contamination removing device according to at least one embodiment of the present invention is a contamination removing device for removing a contamination from oil for lubricating a rolling bearing supporting a rotary shaft of a turbocharger, the contamination removing device including a body portion including an oil channel for the oil to flow, and a contamination removing element for removing the contamination from the oil flowing through the oil channel, the contamination removing element being provided in the oil channel. The body portion is configured to be detachable from the housing so that the oil channel and an oil supply channel for the oil to flow communicate with each other, the oil supply channel being formed in a housing of the turbocharger.
With the above configuration (1), since it is possible to attach, to the contamination removing device, a contamination removing element having specifications different from specifications of a contamination removing element for removing the contamination from the oil for lubricating each part of the internal combustion engine provided with the turbocharger, it is possible to remove the contamination from the oil to such an extent suitable for lubricating the rolling bearing. Moreover, since the body portion including the contamination removing element is detachable from the housing of the turbocharger, it is possible to easily replace the contamination removing element when contamination removal performance thereof decreases. - (2) In some embodiments, in the above configuration (1), the body portion includes an insertion attachment portion configured to be insertable into the oil supply channel from an opening of the oil supply channel in the housing, and one open end of the oil channel is disposed in the insertion attachment portion.
With the above configuration (2), it is possible to easily attach the body portion to the turbocharger by inserting the insertion attachment portion into the oil supply channel from the opening of the oil supply channel. - (3) In some embodiments, in the above configuration (2), in the body portion, a connection portion is formed on a side of the other open end of the oil channel, the connection portion being connected to a pipe for the oil which is supplied from an internal combustion engine provided with the turbocharger.
With the above configuration (3), it is possible to easily connect the pipe for the oil for lubricating each part of the internal combustion engine to the contamination removing device. - (4) In some embodiments, in the above configuration (3), an inner diameter of the connection portion and an outer diameter of the insertion attachment portion have the same diameter.
With the above configuration (4), since it is possible to attach the body portion between the oil supply channel and the pipe for the oil for lubricating each part of the internal combustion engine, it is possible to use the contamination removing device for an existing turbocharger. - (5) In some embodiments, in any one of the above configurations (2) to (4), the insertion attachment portion includes a first male screw formed on an outer circumferential surface thereof, the oil supply channel includes a first female screw formed on an inner circumferential surface thereof from the opening thereof toward the rolling bearing, and the body portion includes a tool fixing portion fixing a tool to the body portion, the tool being used to turn the body portion in order to screw the first male screw and the first female screw together.
With the above configuration (5), since the body portion is easily turned by fixing the tool to the tool fixing portion, it is possible to easily attach the body portion to the housing of the turbocharger. - (6) In some embodiments, in the above configuration (1), the oil supply channel includes a first oil supply channel portion including an opening of the oil supply channel in the housing, and a second oil supply channel portion communicating with the rolling bearing, and the oil channel makes the first oil supply channel portion and the second oil supply channel portion communicate with each other by attaching the body portion to the housing such that the body portion intersects the oil supply channel between the rolling bearing and the opening of the oil supply channel in the housing.
With the above configuration (6), forming, in advance, a configuration for inserting the body portion into the housing, it is possible to attach the body portion to the housing just by inserting the body portion into the configuration. Thus, it is possible to easily attach the body portion. - (7) In some embodiments, in any one of the above configurations (1) to (6), the oil channel includes a second female screw formed on an inner circumferential surface thereof, the contamination removing element includes a second male screw screwable to the second female screw, and the second male screw is screwed to the second female screw to provide the contamination removing element in the oil channel.
With the above configuration (7), it is possible to easily provide the contamination removing element in the oil channel by screwing the second male screw to the second female screw. - (8) In some embodiments, in any one of the above configurations (1) to (7), the contamination removing device includes a retaining portion preventing the contamination removing element from falling off the oil channel in a state in which a pipe for the oil is connected to the oil channel or the oil supply channel and the body portion is attached to the housing, the oil being supplied from an internal combustion engine provided with the turbocharger.
With the above configuration (8), it is possible to prevent the contamination removing element from falling off the oil channel by restricting movement of the contamination removing element by the retaining portion even if the contamination removing element provided in the oil channel moves within the oil channel during operation of the turbocharger. - (9) In some embodiments, in any one of the above configurations (1) to (8), the contamination removing element includes a filter provided in the oil channel.
With the above configuration (9), since it is possible to provide, in the oil channel, a filter having specifications different from specifications of the filter for the oil for lubricating each part of the internal combustion engine, it is possible to prepare oil suitable for lubricating the rolling bearing to lubricate the rolling bearing. - (10) In some embodiments, in the above configuration (9), the filter has a mesh size of 3 to 15 µm.
With the above configuration (10), since it is possible to use a filter, which may be clogged in a short term if used as the filter for the oil for lubricating each part of the internal combustion engine, only for the oil lubricating the rolling bearing, it is possible to prepare the oil lubricating the rolling bearing without causing a problem in lubricating each part of the internal combustion engine. - (11) In some embodiments, in any one of the above configurations (1) to (8), the contamination removing element includes a magnet provided in the oil channel.
Since contaminations included in oil are often substances attracted to a magnet, such as metallic powder, with the above configuration (11), it is possible to remove the contaminations from the oil by attracting the contaminations to the magnet. The magnet is not clogged unlike the filter and has a lower oil supply resistance than the filter, making it possible to suppress a possibility of a trouble in supplying oil to the rolling bearing as compared with a case in which the filter is used. - (12) A turbocharger according to at least one embodiment of the present invention includes a turbine rotor, a compressor rotor, a rotary shaft connected to the turbine rotor and the compressor rotor respectively, and rotating with the turbine rotor and the compressor rotor, a rolling bearing supporting the rotary shaft, a housing accommodating the rolling bearing, an oil supply channel through which oil for lubricating the rolling bearing flows, the oil supply channel being formed in the housing, and at least one contamination removing device according to any one of the above configurations (1) to (11) detachably attached to the housing.
With the above configuration (12), since it is possible to attach, to the contamination removing device, the contamination removing element having the specifications different from the specifications of the contamination removing element for removing the contamination from the oil for lubricating each part of the internal combustion engine provided with the turbocharger, it is possible to remove the contamination from the oil to such an extent suitable for lubricating the rolling bearing. Moreover, since the body portion including the contamination removing element is detachable from the housing of the turbocharger, it is possible to easily replace the contamination removing element when the contamination removal performance thereof decreases. - (13) In some embodiments, in the above configuration (12), the at least one contamination removing device includes a first contamination removing device and a second contamination removing device, the oil supply channel includes a first oil supply channel portion including an opening of the oil supply channel in the housing, and a second oil supply channel portion communicating with the rolling bearing, the first contamination removing device includes a first body portion including a first oil channel for the oil to flow, the first body portion includes an insertion attachment portion configured to be insertable into the oil supply channel from an opening of the oil supply channel in the housing, and in the insertion attachment portion, one open end of the first oil channel is disposed, and the second contamination removing device includes a second body portion including a second oil channel for the oil to flow, and the oil channel makes the first oil supply channel portion and the second oil supply channel portion communicate with each other by attaching the second body portion to the housing such that the second oil channel intersects the oil supply channel between the rolling bearing and the opening of the oil supply channel in the housing.
With the above configuration (13), since the contamination can be removed from the oil in two stages by the first contamination removing device and the second contamination removing device, it is possible to lubricate the rolling bearing with cleaner oil. - (14) In some embodiments, in the above configuration (13), the first contamination removing device includes a first contamination removing element which is a magnet provided in the first oil channel, and the second contamination removing device includes a second contamination removing element which is a filter provided in the second oil channel.
- With the above configuration (14), since it is possible to reduce a removal quantity of the contaminations with a filter by removing the contamination from the oil with the filter provided in the second contamination removing device after removing the contaminations from the oil with the magnet provided in the first contamination removing device, it is possible to increase the lifetime of the filter.
- According to at least one embodiment of the present invention, since it is possible to attach, to a contamination removing device, a contamination removing element having specifications different from specifications of a contamination removing element for removing contaminations from oil for lubricating each part of an internal combustion engine provided with a turbocharger, it is possible to remove the contaminations from the oil to such an extent suitable for lubricating a rolling bearing. Moreover, since a body portion including the contamination removing element is detachable from the housing of the turbocharger, it is possible to easily replace the contamination removing element when contamination removal performance thereof decreases.
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FIG. 1 is a cross-sectional view of a turbocharger according toEmbodiment 1 of the present invention. -
FIG. 2 is a perspective view of a contamination removing device according toEmbodiment 1 of the present invention. -
FIG. 3 is a partial cross-sectional view of an oil supply channel formed in a housing of the turbocharger according toEmbodiment 1 of the present invention. -
FIG. 4 is a cross-sectional view of the contamination removing device according toEmbodiment 1 of the present invention. -
FIG. 5 is a partial cross-sectional view of the contamination removing device according toEmbodiment 1 of the present invention. -
FIG. 6 is a cross-sectional view of the contamination removing device according toEmbodiment 2 of the present invention. -
FIG. 7 is a partial cross-sectional view of the contamination removing device according toEmbodiment 2 of the present invention. -
FIG. 8 is a cross-sectional view of the turbocharger according toEmbodiment 3 of the present invention. -
FIG. 9 is a cross-sectional view of the contamination removing device according toEmbodiment 3 of the present invention. -
FIG. 10 is a partial cross-sectional view of an oil supply channel formed in the housing of the turbocharger according toEmbodiment 3 of the present invention. -
FIG. 11 is a partial cross-sectional view of the contamination removing device according toEmbodiment 3 of the present invention. -
FIG. 12 is a partial cross-sectional view of a modified example of the contamination removing device according toEmbodiment 3 of the present invention. -
FIG. 13 is a cross-sectional view of the contamination removing device according toEmbodiment 4 of the present invention. -
FIG. 14 is a partial cross-sectional view of the contamination removing device according toEmbodiment 4 of the present invention. -
FIG. 15 is a partial cross-sectional view of a modified example of the contamination removing device according toEmbodiment 4 of the present invention. -
FIG. 16 is a cross-sectional view of the turbocharger according toEmbodiment 5 of present invention. - Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. However, the scope of the present invention is not limited to the following embodiments. It is intended that dimensions, materials, shapes, relative positions and the like of components described in the embodiments shall be interpreted as illustrative only and not intended to limit the scope of the present invention.
- As shown in
FIG. 1 , aturbocharger 1 includes aturbine rotor 2, acompressor rotor 3, arotary shaft 4 connected to theturbine rotor 2 and thecompressor rotor 3 respectively and rotating with theturbine rotor 2 and thecompressor rotor 3, and a rollingbearing 5 supporting therotary shaft 4, and ahousing 6 accommodating the rollingbearing 5. Thehousing 6 internally forms anoil supply channel 7 for supplying oil to the rollingbearing 5 and anoil discharge channel 8 for discharging oil from theturbocharger 1. Theoil supply channel 7 and apipe 9 for oil supplied from an engine (internal combustion engine) (not shown) provided with theturbocharger 1 communicate with each other via acontamination removing device 10 detachably attached to thehousing 6. - The rolling
bearing 5 is arranged so as to support therotary shaft 4 between theturbine rotor 2 and thecompressor rotor 3. The rollingbearing 5 includes a cylindricalinner race 50 coaxially coupled to therotary shaft 4, a cylindricalouter race 51 arranged coaxially with theinner race 50 and radially outward of theinner race 50, and a plurality of rollingelements 52 disposed between theinner race 50 and theouter race 51. Theinner race 50 and theouter race 51 are arranged at intervals from one another over an entire circumferential direction. - The
oil supply channel 7 is branched into two branchedoil supply channels oil supply channels inner race 50 and theouter race 51 via throughholes outer race 51. Thus, the oil supplied from the engine (not shown) via thepipe 9 sequentially flows through thecontamination removing device 10, theoil supply channel 7, and the branchedoil supply channels inner race 50 and theouter race 51. - The
oil discharge channel 8 has one end which communicates withopen ends bearing 5 in the axial direction and the space between theinner race 50 and theouter race 51, and the other end which communicates with adischarge hole 53 opening to theoil discharge channel 8. Thus, the oil supplied to the space between theinner race 50 and theouter race 51 is discharged to theoil discharge channel 8 via the open ends 5a, 5b and thedischarge hole 53, flows through theoil discharge channel 8, and then is discharged from theturbocharger 1. - As shown in
FIG. 2 , thecontamination removing device 10 includes abody portion 11. Thebody portion 11 includes aninsertion attachment portion 12 and ahead portion 13 shaped into a hexagonal column by six flat side surfaces 14. Thebody portion 11 is an attachment for attaching thecontamination removing device 10 to thehousing 6 of theturbocharger 1 by an operation to be described later. On the outer circumferential surface of theinsertion attachment portion 12, a firstmale screw 15 is formed. As shown inFIG. 3 , on the inner circumferential surface of theoil supply channel 7, a firstfemale screw 7d is formed from anopening 7c of theoil supply channel 7 in thehousing 6 toward the rollingbearing 5. The inner diameter of theoil supply channel 7 and the outer diameter of theinsertion attachment portion 12 have the same diameter. That is, the root diameter of the firstfemale screw 7d and the outer diameter of the firstmale screw 15 have the same diameter. Thus, it is possible to attach thecontamination removing device 10 to thehousing 6 by inserting theinsertion attachment portion 12 into theoil supply channel 7 from theopening 7c of theoil supply channel 7 in thehousing 6 while screwing the firstfemale screw 7d and the firstmale screw 15 together. - As shown in
FIG. 2 , it is possible to screw the firstmale screw 15 and the firstfemale screw 7d together by turning thebody portion 11 while holding the flat side surfaces 14 with a tool (not shown) such as a spanner when inserting theinsertion attachment portion 12 into the oil supply channel 7 (seeFIG. 3 ). Thus, it possible to easily attach thecontamination removing device 10 to the housing 6 (seeFIG. 3 ). Since the tool is fixed to the body portion by holding the flat side surfaces 14, the side surfaces 14 serve as a tool fixing portion for fixing the tool to thebody portion 11. - As shown in
FIG. 4 , in thebody portion 11 of thecontamination removing device 10, anoil channel 20 penetrating in the axial direction of thebody portion 11 is formed. Theoil channel 20 is configured such that oneopen end 20a thereof opens to anupper end surface 13a of thehead portion 13, and the otheropen end 20b thereof opens to anend 12a of theinsertion attachment portion 12. On the inner circumferential surface of theoil channel 20, aconnection portion 21 serving as a female screw is formed from theopen end 20a toward theopen end 20b. Theconnection portion 21 is configured to be screwable with a male screw formed at the tip of the pipe 9 (seeFIG. 1 ). - In addition, on the inner circumferential surface of the
oil channel 20, a secondfemale screw 22 is also formed toward theopen end 20b following a region where theconnection portion 21 is formed. Acontamination removing element 23 includes afilter 23a of a cup shape and a cylindrical holdingmember 24 holding thefilter 23a. On the outer circumferential surface of the holdingmember 24, a secondmale screw 25 configured to be screwable with the secondfemale screw 22 is formed. Screwing the secondmale screw 25 to the secondfemale screw 22, the holdingmember 24 holding thefilter 23a is provided in theoil channel 20. That is, it is possible to easily provide thecontamination removing element 23 in theoil channel 20 by screwing the secondmale screw 25 to the secondfemale screw 22. The holdingmember 24 is not limited to the above-described configuration. In a configuration where the secondfemale screw 22 is not formed on the inner circumferential surface of theoil channel 20, and the secondmale screw 25 is not formed in the holdingmember 24, the holdingmember 24 holding thefilter 23a may be configured to be pushed into theoil channel 20 by an interference fit. In this case, thefilter 23a may be replaced by replacing thecontamination removing device 10 itself or by pushing the holdingmember 24 holding thefilter 23a from the opposite end of theoil channel 20 to be removed. - In the
contamination removing device 10, it is possible to provide, in theoil channel 20, thefilter 23a having specifications different from specifications of the filter for oil for lubricating each part of the engine. For example, it is possible to provide, in theoil channel 20, thefilter 23a having a mesh size which causes clogging in a short term if used for the oil for lubricating each part of the engine, such as 3 to 15 µm, preferably 10 µm. In order to lubricate the rolling bearing 5 (seeFIG. 1 ), it is necessary to use oil having less contaminations than the oil lubricating each part of the engine. Thus, it is possible to prepare oil suitable for lubricating the rollingbearing 5 by thefilter 23a and to supply the prepared oil to the rollingbearing 5. - Next, the operation of the
contamination removing device 10 will be described. As shown inFIG. 1 , the oil for lubricating each part of the engine (not shown) is partially supplied to thecontamination removing device 10 via thepipe 9. The oil supplied to thecontamination removing device 10 has its contaminations removed by thefilter 23a (seeFIG. 4 ) when flowing through the oil channel 20 (seeFIG. 4 ). As described above, since the mesh size of thefilter 23a is smaller than that of the filter for the oil lubricating each part of the engine, the oil flowing through thecontamination removing device 10 has less contaminations than the oil lubricating each part of the engine. The oil having less contaminations sequentially flows through theoil supply channel 7, the branchedoil supply channels holes bearing 5, that is, the space between theinner race 50 and theouter race 51 to lubricate the rollingbearing 5. The oil supplied to the space between theinner race 50 and theouter race 51 flows out to theoil discharge channel 8 from the rollingbearing 5 via the open ends 5a, 5b or thedischarge hole 53, flows through theoil discharge channel 8, and then is discharged from theturbocharger 1. - Thus, since it is possible to attach, to the contamination removing device, the
filter 23a having the specifications different from specifications of a filter for removing the contaminations from the oil for lubricating each part of the engine provided with theturbocharger 1, it is possible to remove the contaminations from the oil to such an extent suitable for lubricating the rollingbearing 5. Moreover, since thebody portion 11 including thefilter 23a is detachable from the housing of the turbocharger, it is possible to easily replace thefilter 23a when contamination removal performance thereof decreases. - As shown in
FIG. 5 , inEmbodiment 1, it is possible to configure such that an inner diameter r of thepipe 9 is smaller than an outer diameter Ra of the holdingmember 24 of thecontamination removing element 23. With the above configuration, during operation of the turbocharger 1 (seeFIG. 1 ), even if thecontamination removing element 23 provided in theoil channel 20 moves within theoil channel 20 toward theopen end 20a (seeFIG. 4 ) (in the direction of an arrow A) by loosening screw between the secondmale screw 25 and the secondfemale screw 22, farther movement of thecontamination removing element 23 is restricted by abutting on an end surface 9a of thepipe 9, making it possible to prevent thecontamination removing element 23 from falling off theoil channel 20. In this case, the end surface 9a of thepipe 9 serves as a retaining portion for preventing thecontamination removing element 23 from falling off theoil channel 20. - As shown in
FIG. 4 , inEmbodiment 1, the root diameter of theconnection portion 21 serving as the female screw portion and the outer diameter of the firstmale screw 15 can have the same diameter in thecontamination removing device 10. As shown inFIG. 1 , thepipe 9 is directly connected to theoil supply channel 7 if theturbocharger 1 does not include thecontamination removing device 10. In this case, the outer diameter of the male screw portion (not shown) formed at the tip of thepipe 9 and the root diameter of the firstfemale screw 7d (seeFIG. 3 ) of theoil supply channel 7 have the same diameter. Configuring such that the root diameter of theconnection portion 21 and the outer diameter of the male screw portion formed at the tip of thepipe 9 have the same diameter, and configuring such that the outer diameter of the firstmale screw 15 and the root diameter of the firstfemale screw 7d have the same diameter, it is possible to attach thecontamination removing device 10 between thepipe 9 and theoil supply channel 7. Therefore, it is possible to use thecontamination removing device 10 for the existing turbocharger. - Next, a contamination removing device according to
Embodiment 2 will be described. The contamination removing device according toEmbodiment 2 is obtained by modifyingEmbodiment 1 in terms of the contamination removing element. InEmbodiment 2, the same constituent elements as those inEmbodiment 1 are associated with the same reference numerals and not described again in detail. - As shown in
FIG. 6 , inEmbodiment 2, thecontamination removing element 23 is acylindrical magnet 23b. On the outer circumferential surface of themagnet 23b, the secondmale screw 25 screwing to the secondfemale screw 22 is formed. That is, thecylindrical magnet 23b is provided in theoil channel 20 coaxially with theoil channel 20. Other configurations are the same asEmbodiment 1. - The oil supplied to the
contamination removing device 10 by the same operation asEmbodiment 1 flows through theoil channel 20. The oil flows inside thecylindrical magnet 23b when flowing through theoil channel 20. Contaminations included in oil are often substances attracted to a magnet, such as metallic powder. Thus, the contaminations are removed from oil by being attracted to themagnet 23b when the oil flows inside themagnet 23b. The oil having its contaminations thus removed is supplied to the rolling bearing 5 (seeFIG. 1 ) by the same operation asEmbodiment 1, lubricating the rollingbearing 5. - In
Embodiment 2 as well, since it is possible to attach, to thecontamination removing device 10, themagnet 23b which serves as thecontamination removing element 23 having specifications different from the specifications of the filter for removing the contaminations from the oil for lubricating each part of the engine provided with theturbocharger 1, it is possible to remove the contaminations from the oil to such an extent suitable for lubricating the rollingbearing 5. Moreover, since thebody portion 11 including themagnet 23b is detachable from the housing of the turbocharger, it is possible to easily replace themagnet 23b when contamination removal performance thereof decreases. - Furthermore, the
magnet 23b is not clogged unlike thefilter 23a and has a lower oil supply resistance than thefilter 23a, making it possible to suppress a possibility of a trouble in supplying oil to the rollingbearing 5 as compared with a case in which thefilter 23a is used. The contamination removal performance of thefilter 23a can be adjusted by selecting the mesh size. The contamination removal performance of themagnet 23b can be adjusted by adjusting the axial length of themagnet 23b and/or the strength of a magnetic force of themagnet 23b. - As shown in
FIG. 7 , inEmbodiment 2, it is possible to configure such that the inner diameter r of thepipe 9 is smaller than an outer diameter Rb of themagnet 23b. With the above configuration, during operation of the turbocharger 1 (seeFIG. 1 ), even if themagnet 23b provided in theoil channel 20 moves within theoil channel 20 toward theopen end 20a (seeFIG. 6 ) (in the direction of an arrow B) by loosening screw between the secondmale screw 25 and the secondfemale screw 22, farther movement of themagnet 23b is restricted by abutting on the end surface 9a (retaining portion) of thepipe 9, making it possible to prevent themagnet 23b from falling off theoil channel 20. - Next, a contamination removing device according to
Embodiment 3 will be described. The contamination removing device according toEmbodiment 3 is obtained by modifyingEmbodiment 1 in terms of the body portion of the contamination removing device. InEmbodiment 3, the same constituent elements as those inEmbodiment 1 are associated with the same reference numerals and not described again in detail. - As shown in
FIG. 8 , acontamination removing device 30 is attached to thehousing 6 such that the axial direction of thebody portion 31 and the axial direction of theoil supply channel 7 intersect between the rollingbearing 5 and theopening 7c of theoil supply channel 7. As shown inFIG. 9 , thecontamination removing device 30 has acuboid body portion 31. In thebody portion 31, anoil channel 40 is formed, which penetrates in a direction orthogonal to the axial direction of thebody portion 31. On the inner circumferential surface of theoil channel 40, the secondfemale screw 22 is formed from oneopen end 40a toward the otheropen end 40b of theoil channel 40. Thecontamination removing element 23 includes afilter 23c of a disc shape and the cylindrical holdingmember 24 holding thefilter 23c. On the outer circumferential surface of the holdingmember 24, the secondmale screw 25 configured to be screwable with the secondfemale screw 22 is formed. Screwing the secondmale screw 25 to the secondfemale screw 22, the holdingmember 24 holding thefilter 23c is provided in theoil channel 40. That is, it is possible to easily provide thecontamination removing element 23 in theoil channel 40 by screwing the secondmale screw 25 to the secondfemale screw 22. - As shown in
FIG. 10 , in thehousing 6, anattachment hole portion 35 is formed into which thebody portion 31 of the contamination removing device 30 (seeFIG. 9 ) can be inserted. Theattachment hole portion 35 divides theoil supply channel 7 into a first oilsupply channel portion 7e having theopening 7c and a second oilsupply channel portion 7f to which the branchedoil supply channels body portion 31 of thecontamination removing device 30 into theattachment hole portion 35, the oil channel 40 (seeFIG. 9 ) can make the first oilsupply channel portion 7e and the second oilsupply channel portion 7f communicate with each other, and the oil flowing through the pipe 9 (seeFIG. 8 ) sequentially flows through the first oilsupply channel portion 7e, theoil channel 40, the second oilsupply channel portion 7f, and the branchedoil supply channels bearing 5. Other configurations are the same asEmbodiment 1. - In
Embodiment 3, forming, in thehousing 6 in advance, theattachment hole portion 35 into which thebody portion 31 of thecontamination removing device 30 is to be inserted, it is possible to attach thecontamination removing device 30 to thehousing 6 just by inserting thebody portion 31 of thecontamination removing device 30 into theattachment hole portion 35. Thus, it is possible to easily attach thecontamination removing device 30. - As shown in
FIG. 8 , contaminations are removed from oil by thefilter 23c (seeFIG. 9 ) when the oil having flowed through thepipe 9 flows through theoil supply channel 7. Therefore, it is possible to obtain the same effect asEmbodiment 1. - As shown in
FIG. 11 , inEmbodiment 3, it is possible to configure such that an inner diameter r' of the first oilsupply channel portion 7e is smaller than an outer diameter Rc of the holdingmember 24 of thecontamination removing element 23. With the above configuration, during operation of the turbocharger 1 (seeFIG. 8 ), even if thecontamination removing element 23 provided in theoil channel 40 moves within theoil channel 40 toward theopen end 40a (seeFIG. 8 ) (in the direction of an arrow C) by loosening screw between the secondmale screw 25 and the secondfemale screw 22, farther movement of thecontamination removing element 23 is restricted by anend surface 6a of thehousing 6 defining anopening 7c' of the first oilsupply channel portion 7e on a side opposite to theopening 7c, making it possible to prevent thecontamination removing element 23 from falling off theoil channel 40. In this case, theend surface 6a of thehousing 6 serves as a retaining portion for preventing thecontamination removing element 23 from falling off theoil channel 40. - Moreover, as shown in
FIG. 12 , inEmbodiment 3, in thebody portion 31 of thecontamination removing device 30, a recessedportion 45 may be formed, which includes theopen end 40a of theoil channel 40 and is recessed from the surface of thebody portion 31 concentrically with theoil channel 40. The disc-shapedfilter 23c may be arranged in the recessedportion 45 to make the surface of thefilter 23c and the surface of thebody portion 31 flush with each other. In this case, it is configured such that the inner diameter r' of the first oilsupply channel portion 7e is smaller than an outer diameter Rd of thefilter 23c. In the configuration, attaching thecontamination removing device 30 to thehousing 6, thefilter 23c is retained by theend surface 6a of thehousing 6 defining the opening 7c' of the first oilsupply channel portion 7e. Thus, it is possible to prevent thefilter 23c from falling off theoil channel 40. In this case as well, theend surface 6a of thehousing 6 serves as a retaining portion for preventing thefilter 23c from falling off theoil channel 40. - Next, a contamination removing device according to
Embodiment 4 will be described. The contamination removing device according toEmbodiment 4 is obtained by modifyingEmbodiment 3 in terms of the contamination removing element. InEmbodiment 4, the same constituent elements as those inEmbodiment 3 are associated with the same reference numerals and not described again in detail. - As shown in
FIG. 13 , inEmbodiment 4, thecontamination removing element 23 is acylindrical magnet 23b. On the outer circumferential surface of themagnet 23b, the secondmale screw 25 screwing to the secondfemale screw 22 is formed. That is, thecylindrical magnet 23b is provided in theoil channel 40 coaxially with theoil channel 40. Other configurations are the same asEmbodiment 3. - Oil is supplied to the
contamination removing device 30 by the same operation asEmbodiment 3. A principle that contaminations are removed from oil by themagnet 23b provided in thecontamination removing device 30 is the same asEmbodiment 2. The oil having its contaminations removed by themagnet 23b is supplied to the rolling bearing 5 (seeFIG. 8 ) by the same operation asEmbodiment 3, lubricating the rollingbearing 5. Therefore, it is possible to obtain the same effect asEmbodiment 2. - An advantage of using the
magnet 23b, instead of thefilter 23c, as thecontamination removing element 23 and a method of adjusting the contamination removal performance of themagnet 23b are the same asEmbodiment 2. - As shown in
FIG. 14 , inEmbodiment 4, it is possible to configure such that the inner diameter r' of the first oilsupply channel portion 7e is smaller than the outer diameter Rb of themagnet 23b. With the above configuration, during operation of the turbocharger 1 (seeFIG. 8 ), even if themagnet 23b provided in theoil channel 40 moves within theoil channel 40 toward theopen end 40a (seeFIG. 8 ) (in the direction of an arrow D) by loosening screw between the secondmale screw 25 and the secondfemale screw 22, farther movement of themagnet 23b is restricted by theend surface 6a of thehousing 6 defining the opening 7c' of the first oilsupply channel portion 7e on the side opposite to theopening 7c, making it possible to prevent themagnet 23b from falling off theoil channel 40. In this case, theend surface 6a of thehousing 6 serves as a retaining portion for preventing themagnet 23b from falling off theoil channel 40. - Moreover, as shown in
FIG. 15 , inEmbodiment 4, in thebody portion 31 of thecontamination removing device 30, the recessedportion 45 may be formed, which includes theopen end 40a of theoil channel 40 and is recessed from the surface of thebody portion 31 concentrically with theoil channel 40. Thecylindrical magnet 23b may be arranged in the recessedportion 45 to make the surface of themagnet 23b and the surface of thebody portion 31 flush with each other. In this case, it is configured such that the inner diameter r' of the first oilsupply channel portion 7e is smaller than the outer diameter Rb of themagnet 23b. In the configuration, attaching thecontamination removing device 30 to thehousing 6, themagnet 23b is retained by theend surface 6a of thehousing 6 defining the opening 7c' of the first oilsupply channel portion 7e. Thus, it is possible to prevent themagnet 23b from falling off theoil channel 40. In this case as well, theend surface 6a of thehousing 6 serves as the retaining portion for preventing themagnet 23b from falling off theoil channel 40. - Next, a contamination removing device according to
Embodiment 5 will be described. InEmbodiment 5, the contamination removing device according toEmbodiment 2 and the contamination removing device according toEmbodiment 3 are attached to the turbocharger. InEmbodiment 5, the same constituent elements as those inEmbodiments - As shown in
FIG. 16 , thecontamination removing device 10 according toEmbodiment 2 is attached to thehousing 6 of theturbocharger 1 by the configuration described inEmbodiment 2. Moreover, thecontamination removing device 30 according toEmbodiment 3 are attached to thehousing 6 of theturbocharger 1 with the configuration described inEmbodiment 3. Other configurations are the same asEmbodiments - The oil for lubricating each part of the engine (not shown) is partially supplied to the
contamination removing device 10 via thepipe 9. The oil supplied to thecontamination removing device 10 has its contaminations attracted to themagnet 23b (seeFIG. 6 ) to be removed when flowing through theoil channel 20 of the contamination removing device 10 (seeFIG. 6 ). Subsequently, the oil flows into thecontamination removing device 30. The oil has its contaminations removed by thefilter 23c (seeFIG. 9 ) when flowing through theoil channel 40 of the contamination removing device 30 (seeFIG. 9 ). Since thefilter 23c removes the contaminations after the contaminations are removed by themagnet 23b in the above configuration, the quantity of the contaminations removed by thefilter 23c is reduced as compared with a configuration in which thefilter 23c first removes the contaminations from the oil flowing through thepipe 9. Thus, it is possible to increase a time before thefilter 23c is clogged, that is, the lifetime of thefilter 23c. An operation of lubricating the rollingbearing 5 with the oil from which the contaminations are removed in two stages by thecontamination removing devices Embodiments - Since the contaminations can be removed from the oil in the two stages by the
contamination removing devices bearing 5 with cleaner oil. - In
Embodiment 5, it is possible to apply some modified examples described inEmbodiment 2 to thecontamination removing device 10 and to apply some modified examples described inEmbodiment 3 to thecontamination removing device 30. - In
Embodiment 5, thecontamination removing element 23 of thecontamination removing device 10 is themagnet 23b, and the contamination removing element of thecontamination removing device 30 includes thefilter 23c. However, the present invention is not limited to this configuration. It may be configured such that thecontamination removing element 23 of thecontamination removing device 10 includes thefilter 23a, and the contamination removing element of thecontamination removing device 30 is themagnet 23b, it may be configured such that the respectivecontamination removing elements 23 of thecontamination removing devices filters contamination removing element 23 of each of thecontamination removing devices magnet 23b. - In
Embodiments head portion 13 of thecontamination removing device 10 has the hexagonal column shape. However, thehead portion 13 is not limited to this shape. It is only necessary that there are at least two flat side surfaces 14 so that thehead portion 13 can be nipped by a tool. Since a polygonal column shape has not less than three side surfaces, thehead portion 13 may have an arbitrary polygonal column shape. In these cases, at least two flat side surfaces and side surfaces forming the arbitrary polygonal column each serve as a tool fixing portion. Furthermore, the tool fixing portion is not limited to the flat side surface of thehead portion 13. For example, if the tool is a wrench of a type with a handle in a tubular socket, a groove having the same shape as the cross-sectional shape of the socket is formed in theupper end surface 13a of thehead portion 13, and the tool is turned while inserting the socket in the groove, making it possible to turn thebody portion 11. In this case, the groove serves as a tool fixing portion. -
- 1
- Turbocharger
- 2
- Turbine rotor
- 3
- Compressor rotor
- 4
- Rotary shaft
- 5
- Rolling bearing
- 5a
- Open end
- 5b
- Open end
- 6
- Housing
- 6a
- End surface (retaining portion)
- 7
- Oil supply channel
- 7a
- Branched oil supply channel
- 7b
- Branched oil supply channel
- 7c
- Opening
- 7c'
- Opening
- 7d
- First female screw
- 7e
- First oil supply channel portion
- 7f
- Second oil supply channel portion
- 8
- Oil discharge channel
- 9
- Pipe
- 9a
- End surface (retaining portion)
- 10
- Contamination removing device
- 11
- Body portion
- 12
- Insertion attachment portion
- 12a
- End
- 13
- Head portion
- 13a
- Upper end surface
- 14
- Side surface (tool fixing portion)
- 15
- First male screw
- 20
- Oil channel
- 20a
- Open end
- 20b
- Open end
- 21
- Connection portion
- 22
- Second female screw
- 23
- Contamination removing element
- 23a
- Filter
- 23b
- Magnet
- 23c
- Filter
- 24
- Holding member
- 25
- Second male screw
- 30
- Contamination removing device
- 31
- Body portion
- 35
- Attachment hole portion
- 40
- Oil channel
- 40a
- Open end
- 40b
- Open end
- 45
- Recessed portion
- 50
- Inner race
- 51
- Outer race
- 51a
- Through hole
- 51b
- Through hole
- 52
- Rolling element
- 53
- Discharge hole
Claims (14)
- A contamination removing device for removing a contamination from oil for lubricating a rolling bearing supporting a rotary shaft of a turbocharger, the contamination removing device comprising:a body portion including an oil channel for the oil to flow; anda contamination removing element for removing the contamination from the oil flowing through the oil channel, the contamination removing element being provided in the oil channel,wherein the body portion is configured to be detachable from the housing so that the oil channel and an oil supply channel for the oil to flow communicate with each other, the oil supply channel being formed in a housing of the turbocharger.
- The contamination removing device according to claim 1,
wherein the body portion includes an insertion attachment portion configured to be insertable into the oil supply channel from an opening of the oil supply channel in the housing, and
wherein one open end of the oil channel is disposed in the insertion attachment portion. - The contamination removing device according to claim 2,
wherein, in the body portion, a connection portion is formed on a side of the other open end of the oil channel, the connection portion being connected to a pipe for the oil which is supplied from an internal combustion engine provided with the turbocharger. - The contamination removing device according to claim 3,
wherein an inner diameter of the connection portion and an outer diameter of the insertion attachment portion have the same diameter. - The contamination removing device according to any one of claims 2 to 4,
wherein the insertion attachment portion includes a first male screw formed on an outer circumferential surface thereof,
wherein the the oil supply channel includes a first female screw formed on an inner circumferential surface thereof from the opening thereof toward the rolling bearing, and
wherein the body portion includes a tool fixing portion fixing a tool to the body portion, the tool being used to turn the body portion in order to screw the first male screw and the first female screw together. - The contamination removing device according to claim 1,
wherein the oil supply channel includes:a first oil supply channel portion including an opening of the oil supply channel in the housing; anda second oil supply channel portion communicating with the rolling bearing, andwherein the oil channel makes the first oil supply channel portion and the second oil supply channel portion communicate with each other by attaching the body portion to the housing such that the body portion intersects the oil supply channel between the rolling bearing and the opening of the oil supply channel in the housing. - The contamination removing device according to any one of claims 1 to 6,
wherein the oil channel includes a second female screw formed on an inner circumferential surface thereof,
wherein the contamination removing element includes a second male screw screwable to the second female screw, and
wherein the second male screw is screwed to the second female screw to provide the contamination removing element in the oil channel. - The contamination removing device according to any one of claims 1 to 7,
wherein the contamination removing device includes a retaining portion preventing the contamination removing element from falling off the oil channel in a state in which a pipe for the oil is connected to the oil channel or the oil supply channel and the body portion is attached to the housing, the oil being supplied from an internal combustion engine provided with the turbocharger. - The contamination removing device according to any one of claims 1 to 8,
wherein the contamination removing element includes a filter provided in the oil channel. - The contamination removing device according to claim 9,
wherein the filter has a mesh size of 3 to 15 µm. - The contamination removing device according to any one of claims 1 to 8,
wherein the contamination removing element includes a magnet provided in the oil channel. - A turbocharger comprising:a turbine rotor;a compressor rotor;a rotary shaft connected to the turbine rotor and the compressor rotor respectively, and rotating with the turbine rotor and the compressor rotor;a rolling bearing supporting the rotary shaft;a housing accommodating the rolling bearing;an oil supply channel through which oil for lubricating the rolling bearing flows, the oil supply channel being formed in the housing; andat least one contamination removing device according to any one of claims 1 to 11 detachably attached to the housing.
- The turbocharger according to claim 12,
wherein the at least one contamination removing device includes a first contamination removing device and a second contamination removing device,
wherein the oil supply channel includes:a first oil supply channel portion including an opening of the oil supply channel in the housing; anda second oil supply channel portion communicating with the rolling bearing,wherein the first contamination removing device includes a first body portion including a first oil channel for the oil to flow, the first body portion includes an insertion attachment portion configured to be insertable into the oil supply channel from an opening of the oil supply channel in the housing, and in the insertion attachment portion, one open end of the first oil channel is disposed, andwherein the second contamination removing device includes a second body portion including a second oil channel for the oil to flow, and the oil channel makes the first oil supply channel portion and the second oil supply channel portion communicate with each other by attaching the second body portion to the housing such that the second oil channel intersects the oil supply channel between the rolling bearing and the opening of the oil supply channel in the housing. - The turbocharger according to claim 13,
wherein the first contamination removing device includes a first contamination removing element which is a magnet provided in the first oil channel, and
wherein the second contamination removing device includes a second contamination removing element which is a filter provided in the second oil channel.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2017/031482 WO2019043893A1 (en) | 2017-08-31 | 2017-08-31 | Foreign matter removing device, and turbocharger provided with foreign matter removing device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3647560A4 EP3647560A4 (en) | 2020-05-06 |
EP3647560A1 true EP3647560A1 (en) | 2020-05-06 |
EP3647560B1 EP3647560B1 (en) | 2023-11-08 |
Family
ID=65525339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17923462.0A Active EP3647560B1 (en) | 2017-08-31 | 2017-08-31 | Turbocharger provided with foreign matter removing device |
Country Status (5)
Country | Link |
---|---|
US (1) | US11415050B2 (en) |
EP (1) | EP3647560B1 (en) |
JP (1) | JP6938648B2 (en) |
CN (1) | CN110998076B (en) |
WO (1) | WO2019043893A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11680525B2 (en) * | 2021-08-20 | 2023-06-20 | Pratt & Whitney Canada Corp. | Lubricant filter for a turbine engine |
CN113882949B (en) * | 2021-09-29 | 2023-11-10 | 中国人民解放军战略支援部队航天工程大学 | Powder rotary detonation space engine |
Family Cites Families (20)
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JPS5916493Y2 (en) * | 1979-02-02 | 1984-05-15 | 靖朗 奥 | Lubricating oil return pipe device for turbo charger |
JPS5916492Y2 (en) | 1979-11-29 | 1984-05-15 | ヤンマーディーゼル株式会社 | Valve/valve seat lubrication device for internal combustion engines |
JPS60139040U (en) | 1984-02-24 | 1985-09-13 | アイシン精機株式会社 | Oil filter for turbo gear |
JPH0647927B2 (en) * | 1988-09-07 | 1994-06-22 | ダイハツ工業株式会社 | Engine oil filter mounting structure |
JP3320129B2 (en) * | 1993-01-14 | 2002-09-03 | 株式会社日立製作所 | Supercharger |
JPH06264755A (en) | 1993-03-16 | 1994-09-20 | Hitachi Ltd | Supercharger |
JP2605773Y2 (en) | 1993-09-29 | 2000-08-07 | 富士重工業株式会社 | Lubricating oil passage structure for turbocharged engine |
JP4294926B2 (en) * | 2002-08-28 | 2009-07-15 | 株式会社Ihi | Turbocharger |
US7040874B1 (en) * | 2004-11-18 | 2006-05-09 | Honeywell International, Inc. | Integrated turbocharger lubricant filter system |
DE102007032702A1 (en) * | 2007-07-13 | 2009-01-22 | Volkswagen Ag | Exhaust-gas turbocharger comprises housing, compressed wheel and turbine carrying shaft, which is mounted in housing by multiple bearings |
US8534424B2 (en) * | 2008-09-10 | 2013-09-17 | Ford Global Technologies, Llc | Automotive turbocharger with integral lubricating oil filter |
JP2010096120A (en) | 2008-10-17 | 2010-04-30 | Jtekt Corp | Bearing device for turbocharger |
CN103281782B (en) | 2009-01-23 | 2016-08-24 | 华为技术有限公司 | Uplink carrier frequencies management method, equipment and system |
JP5353488B2 (en) * | 2009-06-30 | 2013-11-27 | 日産自動車株式会社 | Electrical component structure |
JP2012057544A (en) | 2010-09-09 | 2012-03-22 | Jtekt Corp | Turbocharger with lubricating oil supply device |
CN201826948U (en) * | 2010-09-09 | 2011-05-11 | 刘明鹏 | Turbocharger intermediate body with filter function |
JP6145959B2 (en) | 2011-07-12 | 2017-06-14 | 株式会社Ihi | Turbocharger |
CN102537640B (en) | 2012-02-03 | 2014-06-25 | 吉首大学 | High-efficiency combined oil filter |
DE102012208928A1 (en) * | 2012-02-09 | 2013-08-14 | Schaeffler Technologies AG & Co. KG | Turbocharger roller bearing with internal filter element |
JP6437788B2 (en) | 2013-11-18 | 2018-12-12 | 川崎重工業株式会社 | Engine supercharger |
-
2017
- 2017-08-31 WO PCT/JP2017/031482 patent/WO2019043893A1/en unknown
- 2017-08-31 EP EP17923462.0A patent/EP3647560B1/en active Active
- 2017-08-31 US US16/638,189 patent/US11415050B2/en active Active
- 2017-08-31 CN CN201780093501.0A patent/CN110998076B/en active Active
- 2017-08-31 JP JP2019538865A patent/JP6938648B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
JPWO2019043893A1 (en) | 2020-09-24 |
US11415050B2 (en) | 2022-08-16 |
EP3647560A4 (en) | 2020-05-06 |
CN110998076A (en) | 2020-04-10 |
JP6938648B2 (en) | 2021-09-22 |
US20200362755A1 (en) | 2020-11-19 |
WO2019043893A1 (en) | 2019-03-07 |
EP3647560B1 (en) | 2023-11-08 |
CN110998076B (en) | 2022-12-02 |
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